This page has only limited features, please log in for full access.
Three natural pigments obtained from cochineal, papaya peel, and the microalga Scenedesmus obliquus were tested as sensitizers in dye sensitized Titania solar cells. The absorption characteristics of the pigments and the photoelectrochemical parameters were studied to determine the photoconversion efficiency of the cells. The interfacial charge transport processes present in the individually sensitized and the co-sensitized cells were determined by electrochemical impedance spectroscopy (EIS). The highest efficiencies achieved for individual pigments after testing a set of different concentrations were 0.228, 0.093 and 0.064% using cochineal, papaya peel extract and Scenedesmus obliquus extract respectively. 0.36% conversion efficiency was reached in the sensitized cell using a combination of the three pigments. The efficiency reached is in the range of those reported for natural pigments. Papaya peel extract and chlorophylls from Scenedesmus obliquus were examined for the first time as possible sensitizers in DSSC.
A. Orona-Navar; I. Aguilar-Hernández; T. López-Luke; I. Zarazúa; Victor Hugo Romero Arellano; J.P. Guerrero; N. Ornelas-Soto. Photoconversion efficiency of Titania solar cells co-sensitized with natural pigments from cochineal, papaya peel and microalga Scenedesmus obliquus. Journal of Photochemistry and Photobiology A: Chemistry 2019, 388, 112216 .
AMA StyleA. Orona-Navar, I. Aguilar-Hernández, T. López-Luke, I. Zarazúa, Victor Hugo Romero Arellano, J.P. Guerrero, N. Ornelas-Soto. Photoconversion efficiency of Titania solar cells co-sensitized with natural pigments from cochineal, papaya peel and microalga Scenedesmus obliquus. Journal of Photochemistry and Photobiology A: Chemistry. 2019; 388 ():112216.
Chicago/Turabian StyleA. Orona-Navar; I. Aguilar-Hernández; T. López-Luke; I. Zarazúa; Victor Hugo Romero Arellano; J.P. Guerrero; N. Ornelas-Soto. 2019. "Photoconversion efficiency of Titania solar cells co-sensitized with natural pigments from cochineal, papaya peel and microalga Scenedesmus obliquus." Journal of Photochemistry and Photobiology A: Chemistry 388, no. : 112216.
Surface Enhanced Raman Spectroscopy (SERS) is a powerful analytical technique to study the vibrational properties of target analytes at low concentrations. The implementation of SERS as a routine technique requires the use of novel substrates in which the plasmonic effects of metallic nanoparticles can be overexpressed. In this study, carbon-based electrospun nanofibers (CNFs) obtained from Polyacrylonitrile (PAN), by combining far-field electrospinning with a high-temperature carbonization technique, were used to prepare SERS-active substrates. The surface of the prepared CNFs was modified through an oxidative process; subsequently, amine groups were incorporated via covalent functionalization with 3-aminopropyl-trimethoxisilane (APTMS). Finally, the CNFs were decorated with previously prepared gold nanoparticles (AuNPs) of ~12 nm diameter. SERS-active substrates were tested, sensing the dye Rhodamine 110 at 10–4, 10–5 and 10–6 M using a 514 nm laser line. Scanning electron microscopy, Transmission electron microscopy, Raman spectroscopy and UV-Vis spectrophotometry were employed to characterize the SERS-active substrates as well as the pristine CNFs and the AuNPs. Additionally, vibrational calculations of Rhodamine 110 were carried out by using ab initio DFT calculations, based on the B3LYP/6-311++G(d,p) method, to gain insight into its spectral properties. Assignment of normal modes was carried out using the simulated Raman spectrum. Furthermore, a comparison between the normal modes and the SERS measurements are presented. The proposed modification on CNFs is expected to allow for a more controlled nanoparticles distribution in order to improve sensitivity and high-speed monitoring at low concentrations.
Fabiola Armenta-Monzón; Iris Aguilar-Hernández; Alejandra Garcia; Sunshine Holmberg; Eduardo Pisano; Gesuri Morales-Luna; Manuel Garcia-Mendez; Nancy Ornelas-Soto. Characterization of Rhodamine 110 adsorbed on carbon-based electrospun nanofibers decorated with gold nanoparticles by Raman spectroscopy and SERS. Materials Research Express 2019, 6, 125012 .
AMA StyleFabiola Armenta-Monzón, Iris Aguilar-Hernández, Alejandra Garcia, Sunshine Holmberg, Eduardo Pisano, Gesuri Morales-Luna, Manuel Garcia-Mendez, Nancy Ornelas-Soto. Characterization of Rhodamine 110 adsorbed on carbon-based electrospun nanofibers decorated with gold nanoparticles by Raman spectroscopy and SERS. Materials Research Express. 2019; 6 (12):125012.
Chicago/Turabian StyleFabiola Armenta-Monzón; Iris Aguilar-Hernández; Alejandra Garcia; Sunshine Holmberg; Eduardo Pisano; Gesuri Morales-Luna; Manuel Garcia-Mendez; Nancy Ornelas-Soto. 2019. "Characterization of Rhodamine 110 adsorbed on carbon-based electrospun nanofibers decorated with gold nanoparticles by Raman spectroscopy and SERS." Materials Research Express 6, no. 12: 125012.
In many countries, soil contamination and lead exposure is a persistent human and environmental health issue, while in others, it is an emerging concern. Defining the extent of lead contamination and assessing human health risk allow for efficient prevention agendas. The different types of land uses delimit the exposure frequency and hence can influence the evaluation of possible threats. In this study, human health risk assessment is performed under different land use scenarios, after determining the concentration of lead in topsoil of a rehabilitated space. An analytical hybrid method was used to determine the concentrations of the heavy metal. Human health risk indicators, hazard quotient and cancer risk, were subsequently calculated and compared under such scenarios of varying population exposure by land use. Results indicate that an increasing exposure can set health risk indicators above the tolerable levels. Correctly defining the exposure frequency by land use is very important to determine the actual risk levels of a site. Local regulators should take this information into account before designing prevention plans, especially in localities where migration and urbanization are major development factors and since the land use of a public place could change over time and alter the exposure frequency to soil.
Ricardo Urrutia-Goyes; Nancy Ornelas-Soto. The Importance of Land Use Definition in Human Health Risk Assessment Related to Lead in Soils. BioMed Research International 2019, 2019, 7973890 -9.
AMA StyleRicardo Urrutia-Goyes, Nancy Ornelas-Soto. The Importance of Land Use Definition in Human Health Risk Assessment Related to Lead in Soils. BioMed Research International. 2019; 2019 ():7973890-9.
Chicago/Turabian StyleRicardo Urrutia-Goyes; Nancy Ornelas-Soto. 2019. "The Importance of Land Use Definition in Human Health Risk Assessment Related to Lead in Soils." BioMed Research International 2019, no. : 7973890-9.
BiFeO3 (BFO) nanoparticles (NPs) were synthesized using the sol-gel method at different calcination temperatures from 400 °C to 600 °C. XRD studies have confirmed that all BFO NPs show distorted rhombohedral crystals that match the R3c space group. We found evidence of local structural strain that develops with increasing particle size as suggested by TEM and Raman spectroscopy measurements. Magnetic measurements suggest that NPs have two distinct regimes: a ferromagnetic-like one at low temperatures and a superparamagnetic-like one at room temperature. The crossover temperature increases with NPs size, suggesting a size-dependent blocking magnetic regime. Similarly, local piezoelectric measurements at room temperature in single NP have confirmed a ferroelectric order with a NP size-dependent d33 coefficient. An analysis of both the ferroelectric and the magnetic results suggest that ferromagnetism and ferroelectricity coexist at room temperature in NPs. Our results lead to the possibility of tailoring the ferroic order in multifunctional materials by means of NP size.
Diego Carranza-Celis; Alexander Cardona-Rodríguez; Jackeline Narváez; Oscar Moscoso Londoño; Diego Muraca; Marcelo Knobel; Nancy Ornelas-Soto; Andreas Reiber; Juan Gabriel Ramírez. Control of Multiferroic properties in BiFeO3 nanoparticles. Scientific Reports 2019, 9, 1 -9.
AMA StyleDiego Carranza-Celis, Alexander Cardona-Rodríguez, Jackeline Narváez, Oscar Moscoso Londoño, Diego Muraca, Marcelo Knobel, Nancy Ornelas-Soto, Andreas Reiber, Juan Gabriel Ramírez. Control of Multiferroic properties in BiFeO3 nanoparticles. Scientific Reports. 2019; 9 (1):1-9.
Chicago/Turabian StyleDiego Carranza-Celis; Alexander Cardona-Rodríguez; Jackeline Narváez; Oscar Moscoso Londoño; Diego Muraca; Marcelo Knobel; Nancy Ornelas-Soto; Andreas Reiber; Juan Gabriel Ramírez. 2019. "Control of Multiferroic properties in BiFeO3 nanoparticles." Scientific Reports 9, no. 1: 1-9.
Flexible multiferroic nanofibers of poly(vinylidene fluoride-trifluoroethylene) (PVDF-TrFE) containing 20% w/w of bismuth ferrite soped with neodymium and cobalt (Nd0.05Bi0.95Fe0.95Co0.05O3) nanoparticles were fabricated by electrospinning. SEM micrographs show well aligned nanofibers with average diameter of 420 nm, X-Ray diffraction revealed R3c crystalline structure corresponding to Nd0.05Bi0.95Fe0.95Co0.05O3 and crystalinity β phase of PVDF-TrFE polymer. FTIR spectra and DSC thermogram were used to investigate the crystallization behavior of PVDF-TrFE and showed pure β phase crystals and high degree of crystallinity. Dielectric measurements determined a low conductivity was found (3X10-6 - 1X10-9 S) together with a piezoelectric coefficient of 35 pm/V (-d33) and low permitivity (εr = 30 - 42). Obtained nanofibers displayed a ferromagnetic hysteresis loop, with coercivity of 140 mT and remnant magnetization of 0.580 Am2/kg at room temperature. The coexistence of magnetic hysteresis and ferroelectric properties in Nd0.05Bi0.95Fe0.95Co0.05O3/PVDF-TrFE nanofibers indicates magnetoelectric performance and hint for potential applications on technological devices.
N. Hernández; Virgilio Gonzàlez; I.B. Dzul-Bautista; N. Ornelas-Soto; J.M. Barandiarán; J. Gutierrez; I.B. Dzul; N. Ornelas. Electrospun poly(vinylidene fluoride-trifluoroethylene) based flexible magnetoelectric nanofibers. European Polymer Journal 2018, 109, 336 -340.
AMA StyleN. Hernández, Virgilio Gonzàlez, I.B. Dzul-Bautista, N. Ornelas-Soto, J.M. Barandiarán, J. Gutierrez, I.B. Dzul, N. Ornelas. Electrospun poly(vinylidene fluoride-trifluoroethylene) based flexible magnetoelectric nanofibers. European Polymer Journal. 2018; 109 ():336-340.
Chicago/Turabian StyleN. Hernández; Virgilio Gonzàlez; I.B. Dzul-Bautista; N. Ornelas-Soto; J.M. Barandiarán; J. Gutierrez; I.B. Dzul; N. Ornelas. 2018. "Electrospun poly(vinylidene fluoride-trifluoroethylene) based flexible magnetoelectric nanofibers." European Polymer Journal 109, no. : 336-340.
Emissions from vehicles include particles from tire and brake wearing that can settle down and join industrial discharges into street dust. Metals present in street dust may create ecological and health threats and their analysis is of great environmental relevance. The city of Monterrey, Mexico is an industrial pillar of the country and shows an increasing fleet during the last years, which has yielded higher traffic and emissions. This study analyzes 44 street dust samples taken across the city for total element concentrations by using X-ray fluorescence. Associations and indicators are calculated to define possible origins, levels of pollution, natural or anthropogenic sources, and ecological and human health risks. High concentrations of As, Ba, Cu, Fe, Mo, Ni, Pb, Ti, and Zn were found. Main sources of metals were defined as: tire wearing for Zn and Fe; brake wearing for Ba, Cu, Fe, Pb and Zr; additional industrial sources for Mo, Ni, Pb, and Ti; and other natural sources for As. Ecological risk was found to be moderate across the city and risk due to Pb concentrations was established for children.
R. Urrutia-Goyes; N. Hernandez; O. Carrillo-Gamboa; K.D.P. Nigam; N. Ornelas-Soto. Street dust from a heavily-populated and industrialized city: Evaluation of spatial distribution, origins, pollution, ecological risks and human health repercussions. Ecotoxicology and Environmental Safety 2018, 159, 198 -204.
AMA StyleR. Urrutia-Goyes, N. Hernandez, O. Carrillo-Gamboa, K.D.P. Nigam, N. Ornelas-Soto. Street dust from a heavily-populated and industrialized city: Evaluation of spatial distribution, origins, pollution, ecological risks and human health repercussions. Ecotoxicology and Environmental Safety. 2018; 159 ():198-204.
Chicago/Turabian StyleR. Urrutia-Goyes; N. Hernandez; O. Carrillo-Gamboa; K.D.P. Nigam; N. Ornelas-Soto. 2018. "Street dust from a heavily-populated and industrialized city: Evaluation of spatial distribution, origins, pollution, ecological risks and human health repercussions." Ecotoxicology and Environmental Safety 159, no. : 198-204.
The increasing presence of chemicals and pharmaceuticals in rivers, lakes and groundwater among others, represents a latent threat both to ecosystems and to human health. Conventional treatment methods for water hardly eliminate these pollutants, which are usually dissolved in low concentrations (µgL-1 or ngL-1). Therefore, the use of nanomaterials represents a viable alternative to eliminate them. Titanate nanotubes have been successfully used in adsorption of organic dyes as well as heavy metals, however, their use as an adsorbent of pharmaceuticals and other organic pollutants has been scarcely studied. In this work, unmodified titanate nanotubes as well as modified titanate nanotubes by using a surfactant, were synthesized and characterized to study the adsorption of six organic pollutants of interest through first and second order kinetic models, as well as, adsorption isotherms of Freundlich and Langmuir. The synthesized nanotubes showed good efficiency for the adsorption of persistent organic compounds, reaching a maximum adsorption percentage of 83%, 78%, 54%, 43%, 30% and 47% for 2,4,6-trichlorophenol, oxytetracycline, 2,4-dichlorophenol, tolazamide, captopril, and metformin respectively. Moreover, removal of pollutants was also successfully carried out in groundwater samples.
Carolina Orona-Návar; Raul García-Morales; Rodrigo Rubio; Jürgen Mahlknecht; Raul I. Hernandez-Aranda; Juan Gabriel Ramírez; K.D.P. Nigam; Nancy Ornelas-Soto. Adsorptive removal of emerging pollutants from groundwater by using modified titanate nanotubes. Journal of Environmental Chemical Engineering 2018, 6, 5332 -5340.
AMA StyleCarolina Orona-Návar, Raul García-Morales, Rodrigo Rubio, Jürgen Mahlknecht, Raul I. Hernandez-Aranda, Juan Gabriel Ramírez, K.D.P. Nigam, Nancy Ornelas-Soto. Adsorptive removal of emerging pollutants from groundwater by using modified titanate nanotubes. Journal of Environmental Chemical Engineering. 2018; 6 (4):5332-5340.
Chicago/Turabian StyleCarolina Orona-Návar; Raul García-Morales; Rodrigo Rubio; Jürgen Mahlknecht; Raul I. Hernandez-Aranda; Juan Gabriel Ramírez; K.D.P. Nigam; Nancy Ornelas-Soto. 2018. "Adsorptive removal of emerging pollutants from groundwater by using modified titanate nanotubes." Journal of Environmental Chemical Engineering 6, no. 4: 5332-5340.
In this work, a first stage of synthesis to obtain reduced graphene oxide (rGO) using an efficient chemical exfoliation method from graphite was studied. An ammonium hydroxide and a nitric-sulfuric acid mixture were used for in situ oxidation and partial-reduction of graphite. Flakes with a thickness of 3 nm were observed by using AFM, suggesting the presence of ten or less graphene layers. The average C/O atomic percentage ratio obtained was 4.27, which is similar to those results obtained by conventional reduction processes associated with using hydrazine. In addition, a graphitic nitrogen functionalization was observed during the proposed process. Besides that, the precursor of rGO suspension obtained remained stable for six months. Therefore, the present study showed a less aggressive and dangerous chemistry route in order to rGO production than others previously reported works.
A.F. Betancur; Nancy Ornelas-Soto; Andres M. Garay-Tapia; F.R. Pérez; Ángel Salazar; A.G. García. A general strategy for direct synthesis of reduced graphene oxide by chemical exfoliation of graphite. Materials Chemistry and Physics 2018, 218, 51 -61.
AMA StyleA.F. Betancur, Nancy Ornelas-Soto, Andres M. Garay-Tapia, F.R. Pérez, Ángel Salazar, A.G. García. A general strategy for direct synthesis of reduced graphene oxide by chemical exfoliation of graphite. Materials Chemistry and Physics. 2018; 218 ():51-61.
Chicago/Turabian StyleA.F. Betancur; Nancy Ornelas-Soto; Andres M. Garay-Tapia; F.R. Pérez; Ángel Salazar; A.G. García. 2018. "A general strategy for direct synthesis of reduced graphene oxide by chemical exfoliation of graphite." Materials Chemistry and Physics 218, no. : 51-61.
Former battery factories have created environmental and health problems for years and the exposure to lead in surface soils has been underestimated. Nonetheless, the identification of lead contamination and its spatial distribution is crucial. The determination of heavy metals in soils can be performed using inductively coupled plasma mass spectrometry (ICP-MS). However, alternative techniques such as X-ray fluorescence (XRF) have been used lately in environmental studies since measurements can be taken in the field in a prompt manner, despite its lower accuracy. In this study, a former battery factory site in Monterrey, Mexico, has been studied in order to detect lead contamination. Soil samples were assessed for contamination by using an analytical hybrid method that comprises both analytical techniques, namely, ICP-MS and XRF. Samples were taken in 215 locations and, after a simple homogenization process, they were analyzed by using a portable XRF device. Within those 215 sampling points, 25 samples were analyzed concurrently by using ICP-MS according to international sampling guidelines. Results obtained were adjusted in order to define an analytical hybrid method, which encompasses the advantages of each technique. An improved characterization was achieved by using the proposed analytical hybrid method since maps of lead distribution and calculated areas of concern showed better predictability. The combination of spectroscopic techniques is of great applicability for environmental agencies and decision makers.
R. Urrutia-Goyes; A. Argyraki; N. Ornelas-Soto. Characterization of soil contamination by lead around a former battery factory by applying an analytical hybrid method. Environmental Monitoring and Assessment 2018, 190, 429 .
AMA StyleR. Urrutia-Goyes, A. Argyraki, N. Ornelas-Soto. Characterization of soil contamination by lead around a former battery factory by applying an analytical hybrid method. Environmental Monitoring and Assessment. 2018; 190 (7):429.
Chicago/Turabian StyleR. Urrutia-Goyes; A. Argyraki; N. Ornelas-Soto. 2018. "Characterization of soil contamination by lead around a former battery factory by applying an analytical hybrid method." Environmental Monitoring and Assessment 190, no. 7: 429.
The present work shows a new method in order to cost-effectively achieve the synthesis of graphene by Chemical Vapor Deposition (CVD). Unlike most usual processes, where precursors such as argon, H2, CH4, and high purity copper foil are used, the proposed method has replaced the previous ones by N2, N2 (90%) : H2 (10%), C2H2, and electrolytic copper (technical grade) since the use of industrialized precursors helps reduce production costs. On the other hand, the process was modified from a continuous flow system with vacuum to a discontinuous one at atmospheric pressure, eliminating the use of vacuum pump. In addition, this modification optimized the consumption of gases, which reduced the waste and the emission of pollutant gases into the atmosphere. Graphene films were grown under different gas flowrates and temperatures. Then, the obtained material was characterized by TEM, Raman spectroscopy, and AFM, confirming the presence of few graphene layers. In brief, the growth time was reduced to six minutes with acetylene as a carbon precursor at 1000°C and at atmospheric pressure, with a flow rate of 30 sccm. Finally, the reported conditions can be used for the synthesis of good quality graphene films in industrial applications.
A. Moreno-Bárcenas; J. F. Perez-Robles; Y. V. Vorobiev; Nancy Ornelas-Soto; A. Mexicano; A. G. García. Graphene Synthesis Using a CVD Reactor and a Discontinuous Feed of Gas Precursor at Atmospheric Pressure. Journal of Nanomaterials 2018, 2018, 1 -11.
AMA StyleA. Moreno-Bárcenas, J. F. Perez-Robles, Y. V. Vorobiev, Nancy Ornelas-Soto, A. Mexicano, A. G. García. Graphene Synthesis Using a CVD Reactor and a Discontinuous Feed of Gas Precursor at Atmospheric Pressure. Journal of Nanomaterials. 2018; 2018 ():1-11.
Chicago/Turabian StyleA. Moreno-Bárcenas; J. F. Perez-Robles; Y. V. Vorobiev; Nancy Ornelas-Soto; A. Mexicano; A. G. García. 2018. "Graphene Synthesis Using a CVD Reactor and a Discontinuous Feed of Gas Precursor at Atmospheric Pressure." Journal of Nanomaterials 2018, no. : 1-11.
Raul García-Morales; Alejandra Garcia; Carolina Orona-Navar; Johann F. Osma; K.D.P. Nigam; Nancy Ornelas-Soto. Biotransformation of emerging pollutants in groundwater by laccase from P. sanguineus CS43 immobilized onto titania nanoparticles. Journal of Environmental Chemical Engineering 2018, 6, 710 -717.
AMA StyleRaul García-Morales, Alejandra Garcia, Carolina Orona-Navar, Johann F. Osma, K.D.P. Nigam, Nancy Ornelas-Soto. Biotransformation of emerging pollutants in groundwater by laccase from P. sanguineus CS43 immobilized onto titania nanoparticles. Journal of Environmental Chemical Engineering. 2018; 6 (1):710-717.
Chicago/Turabian StyleRaul García-Morales; Alejandra Garcia; Carolina Orona-Navar; Johann F. Osma; K.D.P. Nigam; Nancy Ornelas-Soto. 2018. "Biotransformation of emerging pollutants in groundwater by laccase from P. sanguineus CS43 immobilized onto titania nanoparticles." Journal of Environmental Chemical Engineering 6, no. 1: 710-717.
Urban road dust can be enriched in different elements and hence it can pose a threat to human and environmental health. Proximal soil sensing allows the swift monitoring of such particles in order to drive attention to any possible risks. The goal of this study is to find the variation in concentrations found when using a portable X-ray fluorescence (XRF) proximal sensor for the determination of metals in road dust with different degrees of sample pretreatment. In general, although results are element dependent, sieving samples to a particle size of <250 µm is recommended. This study can help field workers to define an expected accuracy when using sensors in street dust analysis.
Ricardo Urrutia-Goyes; Netzahualpille Hernández; Enrique Ortiz-Nadal; Olivia Carrillo; Nancy Ornelas-Soto. Influence of Particle Size in the Characterization of Street Dust by Proximal Soil Sensing. Proceedings 2017, 2, 118 .
AMA StyleRicardo Urrutia-Goyes, Netzahualpille Hernández, Enrique Ortiz-Nadal, Olivia Carrillo, Nancy Ornelas-Soto. Influence of Particle Size in the Characterization of Street Dust by Proximal Soil Sensing. Proceedings. 2017; 2 (3):118.
Chicago/Turabian StyleRicardo Urrutia-Goyes; Netzahualpille Hernández; Enrique Ortiz-Nadal; Olivia Carrillo; Nancy Ornelas-Soto. 2017. "Influence of Particle Size in the Characterization of Street Dust by Proximal Soil Sensing." Proceedings 2, no. 3: 118.
Surface modification in nanostructured mesoporous silica particles (MSNs) can significantly increase the uptake in myocardial cells. Herein, MSNs particles were synthesized and chemically functionalized to further assess their biocompatibility in rat myocardial cell line H9c2. The surface modification resulted in particles with an enhanced cellular internallization (3-fold increase) with respect to pristine particles. Apoptosis events were not evident at all, while necrosis incidence was significant only at a higher doses (>500μg/mL). In particular, the percentage of necrotic cells decrease in a statistically significant manner for the functionalized particles at lower doses than 100μg/mL. This study concludes that the proposed surface functionalization of MSNs particles does not compromise their viability on H9c2 cells, and therefore they could potentially be used for biomedical purposes. Fourier-transform infrared, Raman, TGA/DSC, N2 adsorption-desorption, and TEM techniques were used to characterize the as-prepared materials. Confocal microscopy and flow cytometry analyses were carried out to measure the histograms of cell complexity and the half maximal inhibitory concentration, respectively. Reactive oxygen species generation was accessed using assays with MitoSOX and Amplex Red fluoroprobes.
Nancy Ornelas-Soto; Rodrigo Rubio-Govea; Carlos E. Guerrero-Beltrán; Eduardo Vázquez-Garza; Judith Bernal-Ramirez; Alejandra García-García; Yuriana Oropeza-Almazán; Gerardo García-Rivas; Flavio F. Contreras-Torres. Enhancing internalization of silica particles in myocardial cells through surface modification. Materials Science and Engineering: C 2017, 79, 831 -840.
AMA StyleNancy Ornelas-Soto, Rodrigo Rubio-Govea, Carlos E. Guerrero-Beltrán, Eduardo Vázquez-Garza, Judith Bernal-Ramirez, Alejandra García-García, Yuriana Oropeza-Almazán, Gerardo García-Rivas, Flavio F. Contreras-Torres. Enhancing internalization of silica particles in myocardial cells through surface modification. Materials Science and Engineering: C. 2017; 79 ():831-840.
Chicago/Turabian StyleNancy Ornelas-Soto; Rodrigo Rubio-Govea; Carlos E. Guerrero-Beltrán; Eduardo Vázquez-Garza; Judith Bernal-Ramirez; Alejandra García-García; Yuriana Oropeza-Almazán; Gerardo García-Rivas; Flavio F. Contreras-Torres. 2017. "Enhancing internalization of silica particles in myocardial cells through surface modification." Materials Science and Engineering: C 79, no. : 831-840.
A. Orona-Navar; I. Aguilar-Hernández; A. Cerdán-Pasarán; T. López-Luke; M. Rodríguez-Delgado; D.L. Cárdenas-Chávez; E. Cepeda-Pérez; N. Ornelas-Soto. Astaxanthin from Haematococcus pluvialis as a natural photosensitizer for dye-sensitized solar cell. Algal Research 2017, 26, 15 -24.
AMA StyleA. Orona-Navar, I. Aguilar-Hernández, A. Cerdán-Pasarán, T. López-Luke, M. Rodríguez-Delgado, D.L. Cárdenas-Chávez, E. Cepeda-Pérez, N. Ornelas-Soto. Astaxanthin from Haematococcus pluvialis as a natural photosensitizer for dye-sensitized solar cell. Algal Research. 2017; 26 ():15-24.
Chicago/Turabian StyleA. Orona-Navar; I. Aguilar-Hernández; A. Cerdán-Pasarán; T. López-Luke; M. Rodríguez-Delgado; D.L. Cárdenas-Chávez; E. Cepeda-Pérez; N. Ornelas-Soto. 2017. "Astaxanthin from Haematococcus pluvialis as a natural photosensitizer for dye-sensitized solar cell." Algal Research 26, no. : 15-24.
R. Urrutia-Goyes; J. Mahlknecht; A. Argyraki; N. Ornelas-Soto. Trace element soil contamination at a former shooting range in Athens, Greece. Geoderma Regional 2017, 10, 191 -199.
AMA StyleR. Urrutia-Goyes, J. Mahlknecht, A. Argyraki, N. Ornelas-Soto. Trace element soil contamination at a former shooting range in Athens, Greece. Geoderma Regional. 2017; 10 ():191-199.
Chicago/Turabian StyleR. Urrutia-Goyes; J. Mahlknecht; A. Argyraki; N. Ornelas-Soto. 2017. "Trace element soil contamination at a former shooting range in Athens, Greece." Geoderma Regional 10, no. : 191-199.
Nancy Ornelas-Soto; Iris A. Aguilar-Hernández; Nils Kristian Afseth; Tzarara López-Luke; Flavio Contreras-Torres; Jens Petter Wold. Ultrasensitive detection of phenolic antioxidants by surface enhanced Raman spectroscopy. Third International Conference on Applications of Optics and Photonics 2017, 1 .
AMA StyleNancy Ornelas-Soto, Iris A. Aguilar-Hernández, Nils Kristian Afseth, Tzarara López-Luke, Flavio Contreras-Torres, Jens Petter Wold. Ultrasensitive detection of phenolic antioxidants by surface enhanced Raman spectroscopy. Third International Conference on Applications of Optics and Photonics. 2017; ():1.
Chicago/Turabian StyleNancy Ornelas-Soto; Iris A. Aguilar-Hernández; Nils Kristian Afseth; Tzarara López-Luke; Flavio Contreras-Torres; Jens Petter Wold. 2017. "Ultrasensitive detection of phenolic antioxidants by surface enhanced Raman spectroscopy." Third International Conference on Applications of Optics and Photonics , no. : 1.
Iris Aguilar; Juan Luis Pichardo-Molina; Tzarara López-Luke; Nancy Ornelas-Soto. Surface enhanced Raman spectroscopy analysis of HeLa cells using a multilayer substrate. Third International Conference on Applications of Optics and Photonics 2017, 1 .
AMA StyleIris Aguilar, Juan Luis Pichardo-Molina, Tzarara López-Luke, Nancy Ornelas-Soto. Surface enhanced Raman spectroscopy analysis of HeLa cells using a multilayer substrate. Third International Conference on Applications of Optics and Photonics. 2017; ():1.
Chicago/Turabian StyleIris Aguilar; Juan Luis Pichardo-Molina; Tzarara López-Luke; Nancy Ornelas-Soto. 2017. "Surface enhanced Raman spectroscopy analysis of HeLa cells using a multilayer substrate." Third International Conference on Applications of Optics and Photonics , no. : 1.
Public places can have an unknown past of pollutants deposition. The exposition to such contaminants can create environmental and health issues. The characterization of a former firing range in Athens, Greece will allow its monitoring and encourage its remediation. This study is focused on Pb contamination in the site due to its presence in ammunition. A dense sampling design with 91 location (10 m apart) was used to determine the spatial distribution of the element in the surface soil of the study area. Duplicates samples were also collected one meter apart from 8 random locations to estimate the heterogeneity of the site. Elemental concentrations were measured using a portable XRF device after simple sample homogenization in the field. Robust Analysis of Variance showed that the contributions to the total variance were 11% from sampling, 1% analytical, and 88% geochemical; reflecting the suitability of the technique. Moreover, the extended random uncertainty relative to the mean concentration was 91.5%; confirming the high heterogeneity of the site. Statistical analysis defined a very high contamination in the area yielding to suggest the need for more in-depth analysis of other contaminants and possible health risks.
Ricardo Urrutia-Goyes; Ariadne Argyraki; Nancy Ornelas-Soto. Lead Determination and Heterogeneity Analysis in Soil from a Former Firing Range. IOP Conference Series: Earth and Environmental Science 2017, 78, 012008 .
AMA StyleRicardo Urrutia-Goyes, Ariadne Argyraki, Nancy Ornelas-Soto. Lead Determination and Heterogeneity Analysis in Soil from a Former Firing Range. IOP Conference Series: Earth and Environmental Science. 2017; 78 (1):012008.
Chicago/Turabian StyleRicardo Urrutia-Goyes; Ariadne Argyraki; Nancy Ornelas-Soto. 2017. "Lead Determination and Heterogeneity Analysis in Soil from a Former Firing Range." IOP Conference Series: Earth and Environmental Science 78, no. 1: 012008.
Tobacco mosaic virus (TMV) is used as an organic biotemplate to prepare hybrid materials with silver nanoparticles (AgNPs). In this study, the native rod-like TMV structure was transformed into spherical particles using a thermal treatment; subsequently, the external surface of the thermally-treated TMV (TT-TMV) were In-Situ covered with AgNPs through cycles of sequential reduction using sodium borohydride. The as-grown nanoparticles show a bimodal distribution on the surface of the TT-TMVs after the fifth nucleation cycle. Results of characterization of the metallized TT-TMV by dynamic light scattering, transmission electron microscopy, atomic force microscopy, and energy-dispersive X-ray spectroscopy accordingly show the effect of cycling on the morphology of the AgNPs/TT-TMV hybrids.
Andrés Rodríguez-Galván; Erick Martínez-Lorán; J. Jesús Naveja; Nancy Ornelas-Soto; Vladimir A. Basiuk; Flavio F Contreras-Torres. In-Situ Metallization of Thermally-Treated Tobacco Mosaic Virus Using Silver Nanoparticles. Journal of Nanoscience and Nanotechnology 2017, 17, 4740 -4747.
AMA StyleAndrés Rodríguez-Galván, Erick Martínez-Lorán, J. Jesús Naveja, Nancy Ornelas-Soto, Vladimir A. Basiuk, Flavio F Contreras-Torres. In-Situ Metallization of Thermally-Treated Tobacco Mosaic Virus Using Silver Nanoparticles. Journal of Nanoscience and Nanotechnology. 2017; 17 (7):4740-4747.
Chicago/Turabian StyleAndrés Rodríguez-Galván; Erick Martínez-Lorán; J. Jesús Naveja; Nancy Ornelas-Soto; Vladimir A. Basiuk; Flavio F Contreras-Torres. 2017. "In-Situ Metallization of Thermally-Treated Tobacco Mosaic Virus Using Silver Nanoparticles." Journal of Nanoscience and Nanotechnology 17, no. 7: 4740-4747.
Soil contamination is a persistent problem in the world. The redevelopment of a site with a historical deposition of metals might conceal the threat of remaining pollution, especially when the site has become a public place. In this study, human health risk assessment is performed after defining the concentrations of Pb, Ni, and Zn in the topsoil of a former shooting range rehabilitated into a public park in the Municipality of Kesariani (Athens, Greece). A methodology that uses inductively coupled plasma mass spectrometry (ICP-MS, 13 samples), another that uses portable X-ray fluorescence (XRF) following a dense sample design (91 samples), and a hybrid approach that combines both, were used to obtain the concentrations of the trace elements. The enrichment factor and geoacummulation index were calculated to define the degree of pollution of the site. The hazard quotient and cancer risk indicators were also computed to find the risk to which the population is exposed. The present study reveals high non-carcinogenic health risk due to Pb pollution with ingestion as the main exposure pathway. The carcinogenic risk for Pb is within tolerable limits, but the definition of land use might alter such a statement. Lastly, regarding Ni and Zn, the site is unpolluted and there is insignificant carcinogenic and non-carcinogenic risks.
Ricardo Urrutia-Goyes; Ariadne Argyraki; Nancy Ornelas-Soto. Assessing Lead, Nickel, and Zinc Pollution in Topsoil from a Historic Shooting Range Rehabilitated into a Public Urban Park. International Journal of Environmental Research and Public Health 2017, 14, 698 .
AMA StyleRicardo Urrutia-Goyes, Ariadne Argyraki, Nancy Ornelas-Soto. Assessing Lead, Nickel, and Zinc Pollution in Topsoil from a Historic Shooting Range Rehabilitated into a Public Urban Park. International Journal of Environmental Research and Public Health. 2017; 14 (7):698.
Chicago/Turabian StyleRicardo Urrutia-Goyes; Ariadne Argyraki; Nancy Ornelas-Soto. 2017. "Assessing Lead, Nickel, and Zinc Pollution in Topsoil from a Historic Shooting Range Rehabilitated into a Public Urban Park." International Journal of Environmental Research and Public Health 14, no. 7: 698.